❓ Frequently Asked Questions
Do I need to install any software?
No. Base64 Encoder / Decoder is a web-based tool — just open it in your browser and start using it. No downloads, plugins, or extensions required.
Can I use Base64 Encoder / Decoder on my phone?
Yes. Base64 Encoder / Decoder is fully responsive and works on phones, tablets, and desktops. The interface adapts automatically to your screen size.
Is my data safe when using Base64 Encoder / Decoder?
Absolutely. Everything runs locally: Base64 Encoder / Decoder and other values are processed on your device, never sent to a server. No data is sent to any server, so there's zero risk of data leaks. Your information stays completely under your control.
Does Base64 Encoder / Decoder upload my data to a server?
No. Base64 Encoder / Decoder uses client-side processing — everything runs in your browser. Your data never leaves your device, and the tool works even without an internet connection.
Is Base64 Encoder / Decoder free to use?
Yes, Base64 Encoder / Decoder is completely free to use. No registration or login required — all features are available immediately.
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used for embedding data in HTML, CSS, and JSON.
📝 Input Content Supports text and file
Conversion Result
📖 What is Base64?
Base64 is a binary-to-text encoding scheme that uses 64 printable characters (A-Z, a-z, 0-9, +, /) to represent binary data. It is commonly used to transmit or store data that needs to stay intact in text-based formats.
How Base64 encoding works
- Every 3 bytes (24 bits) of data are split into 4 groups of 6 bits
- Each 6-bit group is mapped to one printable Base64 character
- When fewer than 3 bytes remain, the
=padding character is used - Encoded data is about 33% larger than the original
Common use cases
- Data URLs: embed images directly in HTML/CSS, such as
data:image/png;base64,iVBOR... - HTTP Basic Auth: encode
username:passwordin the Authorization header - JWT tokens: header and payload parts use Base64URL encoding
- Email attachments: MIME standard uses Base64 to encode attachments
- APIs: encode binary data inside text formats like JSON
Base64 vs Base64URL
- Base64: uses
+and/, with=padding - Base64URL: uses
-and_with no padding, safe for URLs and file names